The title cards are imaginative, cool art and animation themselves and they are meant to tell the story/give a hint of the season/episode in general. When you see one you immediately know that it is Supernatural. The old page and poll can be found here: SPN title cards Season 1-11 + favorite poll There was some interesting discussion about season 11 title card and what it would be like.

I decided in my spare time to watch the new title card piece by piece. It didn't seem that special at first when I saw it but now when I checked what it hid in I actually like it quite a bit. And it can give us little spoilers what we are up against and who is with the good and against them. If you check those images all starts from darkness. A little glimmer of light shines through.

Second image you can see smoke/clouds and light and bluish angel essence. Next images it is more The Darkness smoke, demon smoke and black. It also has small stars in the blackness. There is also hidden 11 seen on few parts. There is smoke that is grey/brown and it turns to bright light end electricity. Some of it seems to have space behind it. The cards turn to bluish grey with clouds. You can still see few lightnings and then it dims to black again. The title text acted like the one from season 1 that might hint the back to basics theme.